Installation instructions: Once you have downloaded the driver,
change to the directory containing the driver package and install the
driver by running, as root, tar xzf NVIDIA-FreeBSD-x86-195.36.24.tar.gz && cd NVIDIA-FreeBSD-x86-195.36.24 && make install

Then, edit your X configuration file so that the NVIDIA X driver
will be used; this can normally be done by running nvidia-xconfig